After completion of this lesson, student must be able to:
Simple machine helps us by magnifying force, accelerating work and by changing the direction of force. This notes gives us the information about machine, its importance, mechanical advantage, velocity ratio.
A lever is a rigid bar may be straight or bent which is capable of rotating fixed point called fulcrum. A pulley is a metallic or wooden disc with a grooved rim. The rim rotates about a horizontal axis passing through its centre. This note gives us information about types of simple machine.
The law of moment states that “In the equilibrium condition of lever, the sum of the anticlockwise moment is equal to the sum of the clockwise moment”. This note gives us further information about moment of force.